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DS3172 Datasheet(PDF) 136 Page - Dallas Semiconductor |
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DS3172 Datasheet(HTML) 136 Page - Dallas Semiconductor |
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136 / 232 page  DS3171/DS3172/DS3173/DS3174 136 of 232 Register Name: PORT.CR1 Register Description: Port Control Register 1 Register Address: (0,2,4,6)40h Bit # 15 14 13 12 11 10 9 8 Name RESERVED PAIS2 PAIS1 PAIS0 LAIS1 LAIS0 BENA RESERVED Default 0 0 0 0 0 0 0 0 Bit # 7 6 5 4 3 2 1 0 Name TMEI MEIM -- PMUM PMU PD RSTDP RST Default 0 0 -- 0 0 1 1 0 Bits 14 to 12: Payload AIS Select [2:0] (PAIS[2:0]). This bit controls when an unframed all ones signal is forced on the receive data path after the receive framer and payload loopback mux. Default: Payload AIS always sent. PAIS[2:0] PORT.CR1 When AIS is sent AIS Code 000 Always UA1 001 When LLB (no DLB) active UA1 010 When PLB active UA1 011 When LLB(no DLB) or PLB active UA1 100 When LOS (no DLB) active UA1 101 When OOF active UA1 110 When OOF, LOS. LLB (no DLB), or PLB active UA1 111 Never none Bits 11 to 10: Line AIS Select [1:0] (LAIS[1:0). These bits control when a DS3 framed AIS or an unframed all ones signal is to be transmitted on TPOSn/TNEGn and/or TXPn/TXNn. The signal on TPOSn/TNEGn can be AMI or unipolar. This signal is sent even when in diagnostic loopback and always over-rides signals from the framers. Default: AIS sent if DLB is enabled. LAIS[1:0] PORT.CR1 Frame Mode Description AIS Code 00 DS3 Automatic AIS when DLB is enabled (PORT.CR4.LBM = 1XX) DS3AIS 00 E3 Automatic AIS when DLB is enabled UA1 01 Any Send UA1 UA1 10 DS3 Send AIS DS3AIS 10 E3 Send AIS UA1 11 Any Disable none |
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